Vibrating machine



Jan. 22, 1935. 5 J, KRNIG 1,989,058

VIBRATING MACHINE Filed April 19, 1953 TMmm @-7.

m lNvENToR y BY @y l ATTORNEY Patented Jan. 22, 1935 poration of .Newerseyl l Y,

,. I;AveiemerjIg;essere minimis". f

f :1 1` lciting (cri 25er- 75V- This invention relates ingeneraltofa vibrator ,or a device` for producing vibrations, and'rmore particularly the invention contemplatesa novel and improved machine for vibrating plastic material -wh-i-le yit isin plastic condi-tion so as ;to cause the material-,to settle in-toa homogeneous mass .and separater from it v`any-excess liquid The invention is especially designed'for'useby dentists ordentaltechni'ciansto facilitate the preparation of plastic compositions which are used in making models, molds, investments and the like.

Machines for this general purpose are known, but they are objectionable for many reasons. Some are noisy in operation so as to cause annoying disturbance; others are complicated and expensive, while some are short-lived and rapidly wear out so as to become useless; and some include special motors or driving mechanism.

Therefore other objects of my invention are to provide a machine of the character described embodying novel and improved features of construction whereby the machine shall be substantially noiseless in operation; to pro-vide a novel and improved machine of this character which shall be adapted for use with any of the regular types of electric motors which Vusually constitute parts of standard dental laboratory equipment; to provide a novel and improved vibrator including a vibrator member, a driving member, a vibrating means actuated by said driving member and normally out of operative engagement therewith, and means whereby said vibrating means is moved into operative engagement with said driving member upon application of pressure to said vibrator member; to provide such a machine which shall be simple and inexpensive in construction and operation; and to obtain other advantages and results as. will be brought out by the following description.

Referring to the accompanying drawing in which corresponding and like parts are designated throughout the several views by the same reference characters:

Figure 1 is a side elevation of a vibrating machine embodying my invention.

Figure 2 is a horizontal sectional View on the line 2-2 of Figure 1 and Figure 3 is an end elevation of the machine.

Specifically describing the illustrated embodiment of the invention, the machine includes. a frame A having legs 1 for supporting the frame on a table or other stationary support. A At the top of the frame a vibrator platform 2 is pivotally mounted at one end as indicated at 3, for vertical movement, said platform being approximately horizontal' .and adapted, it@ receive :a rreceptacle 4 ,for-'containing-,plastic material fbe` vibrated. :',Beneatl-i .the vibrator platformf2, ya vibrating lever 5., ispivotally rmounted I intermediate ,its ends .on :the frame as ,indieatedat :Gry-Onefend-of this Alever .isg adapted to ibe-sep aratel-y engaged ,by` a. idriving mmeclianism1whichin-.the present instance'is-shown Las comprising; a foam; or. .po1:ye0na1fb100k; 'i :which isfmountedeomallvenithelshett .8.; of. an electric motor 9. The lever is normally held out of engagement with said polygonal member 7 by a compression spring 10 which is interposed between the other end of the lever and the frame.

The lever is operatively connected to the vibrator platform 2 by separably abutting parts which in the present instance consist of a push rod 1l which has one end xedly connected to the underside of the platform 2 and its other end in separably abutting engagement with the end of the lever opposite that which is engaged by the polygonal member 7. The push rod 11 and vibrating lever 5 are so related to the platform 2, that when pressure is exerted on the platform as by the application thereto of the container 4, the vibrating lever 5 is moved into engagement with the polygonal driving member '7, while when said pressure or receptacle is removed from the platform the vibrating lever is automatically disengaged by the spring l from the driving member.

In operation, when the motor 9 is started and a receptacle 4 is placed upon the platform 2, the vibrating lever is rapidly oscillated by engagement of the polygonal member 7 with said lever and this causes oscillation or vibration of the platform 2. It will be observed that the platform is raised by the lever 5 and permitted to fall by action of gravity which enhancesthe vibration of the platform.

To limit downwardmovement of the platform 2, a stop rod 12 is adjustably screw-threaded into the frame beneath the platform 2 so that when the platform descends it engages said stop rod. This stop rod permits adjustment of the length of the oscillating stroke of the vibrating lever during vibration of the platform to vary the distance of movement of the vibrator platform.

To make the operation of the machine as silent as possible, the vibrating lever 5 has a rubber cushion roller 13 to engage the polygonal drive member 7; and a rubber cushion block 14 is connected to the end of the push rod 11 so as to abuttingly engage the Vibrating lever. Of course, the block 14 might be connected to the lever instead of to the push rod and the push rod might be 'set screw 18 secured in the "frame,

flxedly connected to the lever and abuttingly engage the platform, instead of the specific construction illustrated. Also, preferably, the upper end of the stop rod 12 has a rubber cushion block 15 to be engaged by the platform 2.

With this construction, it will be observed that the vibrator platform 2 may be rapidly vibrated when desired, and that the platform will not be vibrated except whenpressure is applied to the platform, whether or not the motor is being operated. 'f

The operation of the machine is substantifally noiseless, and the construction is relatively simple, durable and inexpensive. A

To adapt the macliinewith,diierent typeSV of electric motors, the frame may have a recess 16 in one side thereof to looselyreceive thebearing boss'l'l of the motor, the recess being of greater diameter than the yboss and the frame may be separably clamped upon said bearing boss by a Also, preferably the polygonal drive member 7 is removable from the shaft of 'the motor. Therefore, the vibrator may be attache'dto the motor when desired and can be removed therefrom when the Vmotor is requiredfor other purposes, and the vibrator isvpractically universally or interchangeably useful withv any of the various types of motors generally` constituting a part of the standard dental laboratory equipment, the legs 1 permitting the vibrator to be set on a horizontal support independently of a motor and the recess 16 accommodating bearing bosses of different sizes and elevations on diierent motors.

While I have shown and described the invention as embodied in certain details of construction itwill be understood that this is primarily for illustrating the principles of the invention and that many modications and changes may be made in the details of construction without departingl from the spirit or scope of the invention.

Having thus described my invention, what I claim is:

Ayibrator comprising a frame, a horizontal vibrator platform mounted on said frame for vertical movement, a rotatable drive shaft having a cam thereon, a vibrator lever pivotally mounted on said frame with one end engaged by said cam so that rotation of said cam oscillates said lever, and an operative connection between said lever and said vibrator platform whereby oscillation of said lever vibrates said vibrator platform, said vibrating lever having a rubber cushion roller to engage said cam, and said operative connection between said lever and said vibrator platform including two parts in separably abutting relation, one of which is a rubber cushion.v

STEPHEN J. KRIVIG. 

